Copeland compressor system oil return phenomenon

In view of the Copeland compressor pipeline is particularly long, its refrigeration system and full liquid ice making system are more massive. This type of refrigeration temperature is very low Emerson compressor equipment, after the start of the ten minutes not back to oil, even if back to oil, the amount is also very small phenomenon is not uncommon, closely related to the design, no well-designed equipment will appear Copeland compressor oil pressure is too low and had to stop the problem.

How can we solve this problem well, for this type of refrigeration system installation of oil separator is the most suitable, can greatly extend Emerson compressor no oil return running time, to ensure that the Copeland compressor smoothly through the start-up no oil return more dangerous stage.

The lubricating oil that is not separated out will enter the Copeland unit system and flow with the refrigerant in the tube and become circulated. In fact, after the lubricant enters the evaporator, because of the low temperature and small solubility, part of the lubricant will be separated from the refrigerant; and on the other hand, the temperature is low and the viscosity is large at the same time, the separated lubricant will be attached to the inner wall of the tube, so there is almost no liquidity.

Obviously, the lower the evaporation temperature, the lower the oil return capacity. Therefore, the design and operation of Copeland compressors should be designed to facilitate the return of oil to the pipeline, usually by using a descending design, as this mode can ensure a large airflow rate. Some refrigeration systems require low temperatures and require not only a high efficiency oil separator, but also a special solvent to prevent lubricants from clogging the lines and to help the system return oil in a timely manner.

In reality, it is common to see oil return due to poor evaporator and piping design. For full-liquid Emerson compressor system oil return is even more difficult, the piping design should be very careful. However, for this type of system, the high efficiency oil separation mode used can reduce the amount of oil entering the pipeline, which greatly extends the time when the return line does not return oil at start-up.